diff --git a/_example/gen.go b/_example/gen.go
deleted file mode 100644
index 5d666f1..0000000
--- a/_example/gen.go
+++ /dev/null
@@ -1,4 +0,0 @@
-package taskyapi
-
-//go:generate prmdg struct --file=./doc/schema/schema.json --package=taskyapi --output=./struct.go
-//go:generate prmdg jsval --file=./doc/schema/schema.json --package=taskyapi --output=./validator.go
diff --git a/main_test.go b/main_test.go
index 0351b89..4f966d5 100644
--- a/main_test.go
+++ b/main_test.go
@@ -19,7 +19,7 @@ func TestGenerateStructFile(t *testing.T) {
 		{Validator: true, UseTitle: true, Nullable: true},
 	}
 	for _, c := range cases {
-		fp, err := os.Open("./_example/doc/schema/schema.json")
+		fp, err := os.Open("./testdata/doc/schema/schema.json")
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -32,7 +32,7 @@ func TestGenerateStructFile(t *testing.T) {
 
 func TestGenerateJsValValidatorFile(t *testing.T) {
 	pkg := "taskyapi"
-	fp, err := os.Open("./_example/doc/schema/schema.json")
+	fp, err := os.Open("./testdata/doc/schema/schema.json")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -45,7 +45,7 @@ func TestGenerateJsValValidatorFile(t *testing.T) {
 
 func TestGenerateValidatorFile(t *testing.T) {
 	pkg := "taskyapi"
-	fp, err := os.Open("./_example/doc/schema/schema.json")
+	fp, err := os.Open("./testdata/doc/schema/schema.json")
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/parser_test.go b/parser_test.go
index d2387b5..0a7fcd6 100644
--- a/parser_test.go
+++ b/parser_test.go
@@ -7,7 +7,7 @@ import (
 )
 
 func testNewParser(t *testing.T) *Parser {
-	sc, err := schema.ReadFile("./_example/doc/schema/schema.json")
+	sc, err := schema.ReadFile("./testdata/doc/schema/schema.json")
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/_example/doc/.bundle/config b/testdata/doc/.bundle/config
similarity index 100%
rename from _example/doc/.bundle/config
rename to testdata/doc/.bundle/config
diff --git a/_example/doc/Gemfile b/testdata/doc/Gemfile
similarity index 100%
rename from _example/doc/Gemfile
rename to testdata/doc/Gemfile
diff --git a/_example/doc/Gemfile.lock b/testdata/doc/Gemfile.lock
similarity index 100%
rename from _example/doc/Gemfile.lock
rename to testdata/doc/Gemfile.lock
diff --git a/_example/doc/README.md b/testdata/doc/README.md
similarity index 100%
rename from _example/doc/README.md
rename to testdata/doc/README.md
diff --git a/_example/doc/build.sh b/testdata/doc/build.sh
similarity index 100%
rename from _example/doc/build.sh
rename to testdata/doc/build.sh
diff --git a/_example/doc/schema/config.yml b/testdata/doc/schema/config.yml
similarity index 100%
rename from _example/doc/schema/config.yml
rename to testdata/doc/schema/config.yml
diff --git a/_example/doc/schema/heroku.json b/testdata/doc/schema/heroku.json
similarity index 100%
rename from _example/doc/schema/heroku.json
rename to testdata/doc/schema/heroku.json
diff --git a/_example/doc/schema/meta.yml b/testdata/doc/schema/meta.yml
similarity index 100%
rename from _example/doc/schema/meta.yml
rename to testdata/doc/schema/meta.yml
diff --git a/_example/doc/schema/overview.md b/testdata/doc/schema/overview.md
similarity index 100%
rename from _example/doc/schema/overview.md
rename to testdata/doc/schema/overview.md
diff --git a/_example/doc/schema/schema.json b/testdata/doc/schema/schema.json
similarity index 100%
rename from _example/doc/schema/schema.json
rename to testdata/doc/schema/schema.json
diff --git a/_example/doc/schema/schema.md b/testdata/doc/schema/schema.md
similarity index 100%
rename from _example/doc/schema/schema.md
rename to testdata/doc/schema/schema.md
diff --git a/_example/doc/schema/schemata/error.yml b/testdata/doc/schema/schemata/error.yml
similarity index 100%
rename from _example/doc/schema/schemata/error.yml
rename to testdata/doc/schema/schemata/error.yml
diff --git a/_example/doc/schema/schemata/task.yml b/testdata/doc/schema/schemata/task.yml
similarity index 100%
rename from _example/doc/schema/schemata/task.yml
rename to testdata/doc/schema/schemata/task.yml
diff --git a/_example/doc/schema/schemata/user.yml b/testdata/doc/schema/schemata/user.yml
similarity index 100%
rename from _example/doc/schema/schemata/user.yml
rename to testdata/doc/schema/schemata/user.yml
diff --git a/testdata/gen.go b/testdata/gen.go
new file mode 100644
index 0000000..fff283f
--- /dev/null
+++ b/testdata/gen.go
@@ -0,0 +1,4 @@
+package taskyapi
+
+//go:generate go run .. struct --file=./doc/schema/schema.json --package=taskyapi --output=./struct.go
+//go:generate go run .. jsval --file=./doc/schema/schema.json --package=taskyapi --output=./validator.go
diff --git a/_example/struct.go b/testdata/struct.go
similarity index 100%
rename from _example/struct.go
rename to testdata/struct.go
diff --git a/_example/validator.go b/testdata/validator.go
similarity index 97%
rename from _example/validator.go
rename to testdata/validator.go
index 230c0f8..5e53d9a 100644
--- a/_example/validator.go
+++ b/testdata/validator.go
@@ -1,6 +1,6 @@
 package taskyapi
 
-import jsval "github.com/lestrrat-go/go-jsval"
+import "github.com/lestrrat-go/jsval"
 
 var TaskCreateValidator *jsval.JSVal
 var TaskInstancesValidator *jsval.JSVal